L-theanine vs. Ritalin: side effect and effectiveness comparison (a real world drug study)
Summary:
We compare the side effects and drug effectiveness of L-theanine and Ritalin. The phase IV clinical study is created by eHealthMe based on reports (from sources including the FDA) of 72,405 people who take L-theanine and Ritalin, and is updated regularly.
What is L-theanine?
L-theanine has active ingredients of theanine. It is often used in stress and anxiety. eHealthMe is studying from 423 L-theanine users. Check the latest studies of L-theanine.
What is Ritalin?
Ritalin has active ingredients of methylphenidate hydrochloride. It is often used in attention deficit hyperactivity disorder. eHealthMe is studying from 29,427 Ritalin users. Check the latest studies of Ritalin.
eHealthMe: drug outcomes in the real world
eHealthMe runs one of the largest post-marketing drug safety studies in the world. We study millions of patients and 5,000 more each day. Our data-driven phase IV clinical trials have been referenced on 800+ peer-reviewed medical publications including The Lancet, Mayo Clinic Proceedings, and Nature. Tools to study our phase IV findings are available to the public, anonymous and free >>>.
72,405 people who take L-theanine and Ritalin are studied.

Drugs being compared in this study:
- Ritalin (methylphenidate hydrochloride)
- L-Theanine (theanine)
Most common side effects of the drugs, overall:
Most common side effects of the drugs, in long term (1+ years) use:
Drug effectiveness:
L-Theanine:
- not at all: 4.12 %
- somewhat: 23.53 %
- moderate: 39.41 %
- high: 29.41 %
- very high: 3.5300000000000002 %
Ritalin:
- not at all: 2.11 %
- somewhat: 15.24 %
- moderate: 36.46 %
- high: 33.94 %
- very high: 12.26 %
Want to compare L-theanine with Ritalin?
- Personalize this study to your gender and age (0-99+)How to use the study?
DO NOT STOP MEDICATIONS without first consulting your doctor. If there are any serious or long term adverse effects discovered in the study, discuss the study with your doctor to ensure that proper medication management will be in place if applicable.
Related publications that referenced our studies
- Coskun M, Adak I, "Excessive and frequent menstrual bleeding with methylphenidate in an adolescent girl with attention-deficit hyperactivity disorder", Journal of clinical psychopharmacology, 2017 Oct .
- Yektas ?, Samurcu ND, Tufan AE, "Loss of Eyebrows (Madarosis) After Use of Long-Acting Methylphenidate: Case Report", Journal of Clinical Psychopharmacology, 2017 Aug .
- Ersoy MA, Ersoy HT, "Manic symptoms associated with isotretinoin and methylphenidate combination: a case report", Klinik Psikofarmakoloji Bülteni-Bulletin of Clinical Psychopharmacology, 2014 Sep .
- Coskun M, Adak I, Akaltun I, "Bilateral gynecomastia in a preadolescent boy while under treatment with methylphenidate and paroxetine", Journal of clinical psychopharmacology, 2014 Aug .
- Adak, I., & Coskun, M. , "Symptomatic cholelithiasis associated with combined use of methylphenidate and fluoxetine in an otherwise healthy adolescent girl", Psychiatry and Clinical Psychopharmacology, 2014 Jan .
- Coskun, M., & Adak, I. , "Excessive and frequent menstrual bleeding with methylphenidate in an adolescent girl with attention-deficit hyperactivity disorder", Journal of clinical psychopharmacology, 2014 Jan .
- Yalcin O, Aslan AA, Sari BA, Turkbay T, "Possible methylphenidate related hoarseness and disturbances of voice quality: two pediatric cases", Klinik Psikofarmakoloji Bülteni-Bulletin of Clinical Psychopharmacology, 2012 Sep .
- Lufi D, Bucherman M, Akita M, Cohen R, Sibani C, "The effect of methylphenidate on speech patterns of children with attention deficit disorder", Journal of Behavioral Health, 2012 Jan .
- Coskun M, Adak I, "Excessive and frequent menstrual bleeding with methylphenidate in an adolescent girl with attention-deficit hyperactivity disorder", Journal of clinical psychopharmacology, 2017 Oct .
- Yektas ?, Samurcu ND, Tufan AE, "Loss of Eyebrows (Madarosis) After Use of Long-Acting Methylphenidate: Case Report", Journal of Clinical Psychopharmacology, 2017 Aug .
- Ersoy MA, Ersoy HT, "Manic symptoms associated with isotretinoin and methylphenidate combination: a case report", Klinik Psikofarmakoloji Bülteni-Bulletin of Clinical Psychopharmacology, 2014 Sep .
- Coskun M, Adak I, Akaltun I, "Bilateral gynecomastia in a preadolescent boy while under treatment with methylphenidate and paroxetine", Journal of clinical psychopharmacology, 2014 Aug .
- Adak, I., & Coskun, M. , "Symptomatic cholelithiasis associated with combined use of methylphenidate and fluoxetine in an otherwise healthy adolescent girl", Psychiatry and Clinical Psychopharmacology, 2014 Jan .
- Coskun, M., & Adak, I. , "Excessive and frequent menstrual bleeding with methylphenidate in an adolescent girl with attention-deficit hyperactivity disorder", Journal of clinical psychopharmacology, 2014 Jan .
- Yalcin O, Aslan AA, Sari BA, Turkbay T, "Possible methylphenidate related hoarseness and disturbances of voice quality: two pediatric cases", Klinik Psikofarmakoloji Bülteni-Bulletin of Clinical Psychopharmacology, 2012 Sep .
- Lufi D, Bucherman M, Akita M, Cohen R, Sibani C, "The effect of methylphenidate on speech patterns of children with attention deficit disorder", Journal of Behavioral Health, 2012 Jan .
Related studies
Alternative drugs to, pros and cons of:
- L-theanine (134 reports)
- Ritalin (26,188 reports)
Browse all side effects of L-theanine:
a b c d e f g h i j k l m n o p q r s t u v w x y zBrowse all side effects of Ritalin:
a b c d e f g h i j k l m n o p q r s t u v w x y zHow the study uses the data?
The study is based on theanine and methylphenidate hydrochloride (the active ingredients of L-theanine and Ritalin, respectively). Other drugs that have the same active ingredients (e.g. generic drugs or brand names) are also considered. Dosage of drugs is not considered in the study.
Who is eHealthMe?
With medical big data and proven AI/ML algorithms, eHealthMe provides a platform for everyone to run phase IV clinical trials. We study millions of patients and 5,000 more each day. Results of our real-world drug study have been referenced on 800+ peer-reviewed medical publications, including The Lancet, Mayo Clinic Proceedings, and Nature. Our analysis results are available to researchers, health care professionals, patients (testimonials), and software developers (open API).
WARNING, DISCLAIMER, USE FOR PUBLICATION
WARNING: Please DO NOT STOP MEDICATIONS without first consulting a physician since doing so could be hazardous to your health.
DISCLAIMER: All material available on eHealthMe.com is for informational purposes only, and is not a substitute for medical advice, diagnosis, or treatment provided by a qualified healthcare provider. All information is observation-only. Our phase IV clinical studies alone cannot establish cause-effect relationship. Different individuals may respond to medication in different ways. Every effort has been made to ensure that all information is accurate, up-to-date, and complete, but no guarantee is made to that effect. The use of the eHealthMe site and its content is at your own risk.
If you use this eHealthMe study on publication, please acknowledge it with a citation: study title, URL, accessed date.
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